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[cryptolib] generalize PRF definitions, PRP<->PRF #1028

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[cryptolib] generalize PRF definitions, PRP<->PRF #1028

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27 changes: 10 additions & 17 deletions theories/crypto/PRF.eca
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Expand Up @@ -57,30 +57,23 @@ end RF.
abstract theory PseudoRF.
type K.

op dK: { K distr | is_lossless dK } as dK_ll.

op F : K -> D -> R.

module type PseudoRF = {
proc keygen(): K
proc f(_ : K * D): R
proc f(_: K * D): R
}.

module PseudoRF = {
proc keygen() = {
var k;
module PRF (P : PseudoRF) = {
var k : K

k <$ dK;
return k;
proc init() = {
k <@ P.keygen();
}

proc f(k, x) = { return F k x; }
}.

module PRF = {
var k : K
proc f(x: D) = {
var r;

proc init() = { k <$ dK; }
proc f(x: D) = { return F k x; }
r <@ P.f(k, x);
return r;
}
}.
end PseudoRF.
1 change: 0 additions & 1 deletion theories/crypto/prp_prf/Strong_RP_RF.eca
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Expand Up @@ -12,7 +12,6 @@ op uD: { D distr | is_uniform uD /\ is_lossless uD /\ is_full uD } as uD_uf_fu.

(** and a type K equipped with a lossless distribution **)
type K.
op dK: { K distr | is_lossless dK } as dK_ll.

clone import PRP as PRPt with
type D <- D.
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